manufacturing mark
Cartridge
The fifth engineering change in the Model 10 line.
The -4 refers to an engineering change
Denotes it as a "Victory" model, produced for WWII
Made @ 1974
No such model number. However, if you mean a 15-4, 50-450 USD.
If you mean a Model 52, 100-1000 USD or so
If you mean Smith and Wesson, inside the frame near the crane if it has one. Model numbers did not come into use until @ 1957
You will need to get it lettered by S&W
45 Smith and Wesson
smith and wesson.
No engineering changes.